Superconductivity of Ba$_{1-x}$K$_x$Fe$_2$As$_2$ with and without artificial disorder over the entire doping range

ORAL

Abstract

Effects of electron irradiation on superconducting transition temperature and in-plane London penetration depth were studied in single crystals of Ba$_{1-x}$K$_x$Fe$_2$As$_2$ (x= 0.22, 0.34, 0.47, 0.56, 0.65, 0.80, 0.82, 0. 90, 0.92, 1.0). Electron irradiation introduces point - like disorder that gives insight into the superconducting gap structure by studying the effects of increasing scattering. We studied the entire superconducting ``dome'' and find distinctly different behaviours in underdoped, optimal, and overdoped compositions and unusual behaviour near x = 0.7 - 0.8.

*This work was supported by the Department of Energy Office of Science, Basic Energy Sciences under Contract No. DE-AC02-O7CH11358.

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Authors

  • Serafim Teknowijoyo

    • Ames Laboratory and Iowa State University, USA

  • Kyuil Cho

    • Ames Laboratory and Iowa State University, USA
    • Ames laboratory and Department of Physics and Astronomy, Iowa State University

  • Makariy Tanatar

    • Ames Laboratory USDOE, Ames, IA 50011
    • Ames Laboratory and Iowa State University, USA
    • Ames laboratory and Department of Physics and Astronomy, Iowa State University

  • Ruslan Prozorov

    • Ames Laboratory and Iowa State University, USA
    • Ames laboratory and Department of Physics and Astronomy, Iowa State University

  • Yong Liu

    • Ames Laboratory USDOE, Ames, IA 50011
    • Ames Laboratory and Iowa State University, USA
    • Division of Materials Sciences and Engineering, Ames Lab., US DOE, Ames, IA 50011
    • Max-Planck-Institut fuer Festkoerperforschung

  • Thomas A. Lograsso

    • Ames Laboratory and Iowa State University, USA
    • Division of Materials Sciences and Engineering, Ames Lab, US DOE, and Dept. of Materials Science and Engineering, Iowa State Univ., Ames, IA 50011

  • Marcin Konczykowski

    • Ecole Polythechnique, France
    • LSI, Ecole Polytechnique, France
    • Ecole Polytechnique, France